Merge tag 'regmap-v4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...

[deliverable/linux.git] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index e0881c0bd228a71adab280fe9035505850c1d53f..9c590e0f66e9c2189f360bf1b742f54f969713aa 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1712,6 +1712,11 @@ static inline int should_follow_link(struct nameidata *nd, struct path *link,
                return 0;
        if (!follow)
                return 0;
+       /* make sure that d_is_symlink above matches inode */
+       if (nd->flags & LOOKUP_RCU) {
+               if (read_seqcount_retry(&link->dentry->d_seq, seq))
+                       return -ECHILD;
+       }
        return pick_link(nd, link, inode, seq);
 }
 
@@ -3206,11 +3211,6 @@ finish_lookup:
        if (unlikely(error))
                return error;
 
-       if (unlikely(d_is_symlink(path.dentry)) && !(open_flag & O_PATH)) {
-               path_to_nameidata(&path, nd);
-               return -ELOOP;
-       }
-
        if ((nd->flags & LOOKUP_RCU) || nd->path.mnt != path.mnt) {
                path_to_nameidata(&path, nd);
        } else {
@@ -3229,6 +3229,10 @@ finish_open:
                return error;
        }
        audit_inode(nd->name, nd->path.dentry, 0);
+       if (unlikely(d_is_symlink(nd->path.dentry)) && !(open_flag & O_PATH)) {
+               error = -ELOOP;
+               goto out;
+       }
        error = -EISDIR;
        if ((open_flag & O_CREAT) && d_is_dir(nd->path.dentry))
                goto out;